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Preparation of “Cauliflower-Like” ZnO Micron-Sized Particles
Department of Chemistry, The Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan 52900, Israel
* Author to whom correspondence should be addressed.
Received: 27 August 2013; in revised form: 4 November 2013 / Accepted: 7 November 2013 / Published: 14 November 2013
Abstract: Porous polydivinyl benzene (PDVB) microspheres of narrow size distribution were formed by a single-step swelling process of template uniform polystyrene microspheres with divinyl benzene (DVB), followed by polymerization of the DVB within the swollen template microspheres. The PDVB porous particles were then formed by dissolution of the template polystyrene polymer. Unique “cauliflower-like” ZnO microparticles were prepared by the entrapping of the ZnO precursor ZnCl2 in the PDVB porous microspheres under vacuum, followed by calcination of the obtained ZnCl2-PDVB microspheres in an air atmosphere. The morphology, crystallinity and fluorescence properties of those ZnO microparticles were characterized. This “cauliflower-like” shape ZnO particles is in contrast to a previous study demonstrated the preparation of spherical shaped porous ZnO and C-ZnO microparticles by a similar method, using zinc acetate (ZnAc) as a precursor. Two diverted synthesis mechanisms for those two different ZnO microparticles structures are proposed, based on studies of the distribution of each of the ZnO precursors within the PDVB microspheres.
Keywords: ZnO micrometer-sized particles; PDVB microspheres; fluorescence
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Gordon, T.; Grinblat, J.; Margel, S. Preparation of “Cauliflower-Like” ZnO Micron-Sized Particles. Materials 2013, 6, 5234-5246.
Gordon T, Grinblat J, Margel S. Preparation of “Cauliflower-Like” ZnO Micron-Sized Particles. Materials. 2013; 6(11):5234-5246.
Gordon, Tamar; Grinblat, Judith; Margel, Shlomo. 2013. "Preparation of “Cauliflower-Like” ZnO Micron-Sized Particles." Materials 6, no. 11: 5234-5246.